Product Description: Heat Powered FanWood stove fan doesn't require batteries or electricity. It rotates by using the heat on the surface of the stove and automatically adjusts the speed according to the surface temperature of the stove. Dual HeadThe fireplace fan is designed with double head which can distribute heat more evenly, diffusing warm air throughout the whole room perfectly, and continuously bringing warmth in cold winter. Overheating ProtectionThe fireplace fan has built-in bimetallic safety device at the bottom. Once the temperature exceeds 644 F//340C, this bimetallic safety device will gently lift the front of the fan to protect the motor and generator set. Silent WorkingThe heat powered fan produces less noise when working, less than 32db, so you don't even know where the fan is, but you still feel warm. No worry about the working fan disturb your families. Wide ApplicationThe heat powered fan works with gas/ pellet/ wood/ log/ burner stove, which can effectively improve the circulation of warm air. It is an essential warm winter artifact for household.Specification:Product Name: Wood Stove Fan Material: metal Operating temperature range: 122F to 662 F (50 C to 350 C) Air volume: 160-220 Size: 225 x 145 x 110mm/8.86 x 5.71 x 4.33 inch Fan blade size: 110mm/4.33 inch Power: thermoelectric module Package include:1x Wood Stove Fan Note: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement.NOTE:PO BOX address is not supported, please provide the correct physical addressATTENTION:If the customer change their mind and want to cancel the order, please contact us within 2-3 hours after placing the order. Or, once the package is dispatched, we won't be able to intercept packages in transit. Please understand.Refund note: Only return the product cost, not refund the freight!!!